Thread cheese-ejecting device for suspended centrifugal spinning cans



July 21, 1959 c. GARDELLA 2,895,283

THREAD CHEESE-EJECTING DEVICE FOR SUSPENDED CENTRIFUGAL SPINNING CANSFiled Jan. 24. 1956 2,895,283 Patented July 21, 1959 THREADCHEESE-EIECTING DEVICE FOR SUS- PENDED CENTRIFUGAL SPINNING CANSCostantino Gardella, Genoa, Italy Application January 24, 1956, SerialNo. 561,106

Claims priority, application Italy January 28, 1955 2 Claims. (Cl.57--34) This invention relates to a thread cheese-ejecting device forsuspended centrifugal spinning cans, particularly those for the spinningof long and hard bres; such as jute, hemp, sisal and the like.

In these spinning frames, particularly in those provided with high-speedspinning cans, the thread cheeses formed in the cans, when this revolvesat high speeds to 2O thousand r.p.m.), due to the great centrifugalforce, adhere very firmly to the can lwalls and thus it is not easy totake same out. Thus, in many centrifugal spinning frames, in order totake the thread out of the can, it must be recoiled, which is a 4greatinconvenience and causes long interruptions in the spinning process.

According to the invention, the above-mentioned drawbacks are overcomeby providing an ejecting device which consists of a at member, usually adisk, provided with stems projecting through perforations in the closedtop of each of the suspended centrifugal spinning cans. Said stems areprovided with springs which pull same upwardly and tend to keep the saiddisk against the underside of the said top of the spinning can, wherebymeans are provided for positively pushing said stems against the forceof their springs so as to push the said disk downwardly thus ejectingthe thread cheese.

By this means it is possible to eject at the same time the threadcheeses of a whole set of spinning cans of a spinning frame, thussimplifying the whole device and providing for the very rapid andsimultaneous discharge of all thread cheeses. In order to render thisejection more easy, the cans are preferably frusto-conical orbell-shaped.

The invention will be better understood from the following speciiicationwith reference to the attached drawing, in which:

Fig. 1 shows part in view and part in section an ejecting deviceaccording to the invention tted to a centrifugal spinning can formingpart of a spinning frame (shown only in part) and Fig. 2 shows apneumatic control for the ejecting device according to Figure 1.

In the drawing, 1 is the supporting frame from which the bell-likecentrifu-gal spinning cans 2 (of which only one is shown) are suspended.Each can 2 is mounted on ,roller bearings 3 and is preferably driven bya belt drive, the belts being passed on belt pulley 5 fitted on the canneck 102, through which a reciprocating thread guide 6, which may be ofany suitable type, is slidably mounted.

Under the bottom 202 of the bell-shaped centrifugal spinning can 2 aiiat member, usually an ejector disk 8 (which will be called simply theejector) is fitted to which a number of push stems 9 are fastened whichpass through corresponding holes drilled in the closed can top 202 andare provided with heads 109 which cannot pass through the said can topholes. Between the said heads 109 and the -top surface of the can -top202 on said push stems 9 coil springs 10 are threaded which tend to pullthe said stems 9 upwardly so as to draw the ejector 3 against the lowerface of the can bottom 202. Above the push stems of each or preferablyof a set of cans a push bar 11 is fitted, which is pro-1 vided with anaperture 111 in correspondence of the spinning can neck and is providedwith means for pushing same downwardly, so as to press down the pushrods against the spring action, thus pushing downwardly the ejector S,lwhich thus ejects the thread cheese 7. In the embodiment as shown thisejection is rendered easy due to the spinning can 2 being substantiallyfrustoconical or bell-shaped.

In the example as shown, the push bar 11 is controlled pneumatically byconnecting same to the piston rod 112 of a double-acting piston 12mounted in a vertical cylinder 13. The cylinder 13 is fastened forexample under the frame 1 (Fig. l) and the chambers formed at both endsthereof by said piston l2 forming a slidable partition, can be putalternatively into communication -with a compressed air (or other gas)tank 17 through pipings 14, 15 by means of a three-way cock 16. Thuswhen air or other gas under pressure is sent into the lower cylinderchamber 113, the push bar 11 is lifted, whereas when air under pressureis sent into the upper cylinder chamber 213, the push bar 1l is drivendownwardly and thus it depresses the push stems 9 and thus the ejector 8connected thereto is driven away from the can top and ejects the cheese7 out of the spinning can 2.

Of course, the invention may be embodied in many other equivalent ways,without departing from the basic principle thereof, as set out above.Thus, instead of a double-acting piston, also a simple-acting pistoncould be adopted, provided the push bar be provided with suiicientlystrong springs for lifting same after each positive operation by thepressure fluid for expelling the cheeses out of the spinning cans. Also,the ejector, may be also in the form of a spider or of a grid.Furthermore, the control of the push bar could be effected hydraulicallyor by other conventional means permitting a distant control, withoutdeparting from the Spirit of the invention or the scope of the appendedclaims.

I claim:

l. A thread cheese-ejecting device for centrifugal spinning canscomprising a frame, a row of bell-like spinning cans suspended from saidframe, each can having a closed top with a central opening and a crownof spaced holes, an annular disc-like ejector within the top of eachspinning can, a plurality of stems iixed with each ejector andprojecting upwardly through said holes respectively, a head on the upperend of each of said stems, a spring coiled around each stem andinterposed between said stem head and the top of the spinning can tobias the ejector upwardly against the can top, a push member overlyingall of the stems of all of the spinning cans of a row and slightlyspaced therefrom when said stems are not in depressed position, andmeans for reciprocating such push member towards and away from saidstems for depressing said stems to press the ejectors against therespective thread cheeses to effect the removal thereof from therespective cans.

2. A thread cheese-ejecting device for centrifugal spinning canscomprising a frame, a row of bell-like spinning cans suspended from saidframe, each can having a closed top with a central opening and a crownof spaced holes, an annular disc-like ejector within the top `of eachspinning can, a plurality of stems Xed with each ejector and projectingupwardly through said holes respectively, a head on the upper end ofeach of said stems, a spring coiled around each stem and interposedbetween said stern head and the top of the spinning can to bias theejector upwardly against the can top, a push bar o-verlying all of thestems of all of the spinning cans of a row and slightly yspacedtherefrom when said stems are 5 not in depressed position and pneumaticmeans for reciprocating such push bar towards or away from said stemsfor depressing vsaid stems to press the ejectors of all the cans of therow against the respective threads cheeses to effect the removal thereoffrom the respective 10 cans.

References Cited in the le of this patent UNITED STATES PATENTS PapeIan. 16, `1945 Crewdson Ian. 16, 1945 Pape Ian. 16, 1945 FOREIGN PATENTS"Germany Dec. 3, 1942 Germany May 28, 1953

